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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TRACE_EVENT_HEAP_PROFILER_TYPE_NAME_DEDUPLICATOR_H_
#define BASE_TRACE_EVENT_HEAP_PROFILER_TYPE_NAME_DEDUPLICATOR_H_
#include <map>
#include <string>
#include "base/base_export.h"
#include "base/macros.h"
#include "base/trace_event/trace_event_impl.h"
namespace base {
namespace trace_event {
class TraceEventMemoryOverhead;
// Data structure that assigns a unique numeric ID to |const char*|s.
class BASE_EXPORT TypeNameDeduplicator : public ConvertableToTraceFormat {
public:
TypeNameDeduplicator();
~TypeNameDeduplicator() override;
// Inserts a type name and returns its ID.
int Insert(const char* type_name);
// Writes the type ID -> type name mapping to the trace log.
void AppendAsTraceFormat(std::string* out) const override;
// Estimates memory overhead including |sizeof(TypeNameDeduplicator)|.
void EstimateTraceMemoryOverhead(TraceEventMemoryOverhead* overhead) override;
private:
// Map from type name to type ID.
std::map<const char*, int> type_ids_;
DISALLOW_COPY_AND_ASSIGN(TypeNameDeduplicator);
};
} // namespace trace_event
} // namespace base
#endif // BASE_TRACE_EVENT_HEAP_PROFILER_TYPE_NAME_DEDUPLICATOR_H_
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